Activity On Seafloor Linked To Icy Ebb And Flow On Surface

The last million years of Earth’s history has been dominated by the cyclic advance and retreat of ice sheets over large swaths of North America, with ice ages occurring every 40,000 years or so.

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While conventional wisdom says that this icy ebb and flow is an interaction between the water and atmosphere, the cause of the rapid transition between alternating cold glacial and warmer interglacial periods has been a mystery.

Until now. An article appearing in the Jan. 28 issue of the journal Science sheds new light on the role that the Earth itself may play in this climatological ballet.

UConn marine scientist David Lund and his colleagues studied hydrothermal activity along the mid-ocean ridge system – the longest mountain range in the world, which extends some 37,000 miles along the ocean floor – and found a link between pressure and temperature changes.

Their research suggests that the release of hot molten rock, or magma, from beneath the Earth’s crust in response to changes in sea level plays a significant role in the Earth’s climate by causing oceans to alternately warm and cool. This change in temperature is attributed to the release of heat and carbon dioxide (CO2) into the deep ocean.

During cold glacial intervals, ice sheets reached as far south as Long Island and Indiana, while during warm periods, the ice rapidly retreated to Greenland.

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There is evidence that when ice sheets grow, sea level lowers and significant pressure is taken off the ocean ridges. But, as the pressure lessens, the mantle begins melting, which, in turn, warms the water and causes the ice to begin melting. Then, as the ice melts, sea levels rise, causing pressure on the mountain ranges to increase and activity within the mountain ranges to slow.

Think of the effect that applying pressure to a wound has in slowing the flow of bleeding.

The release of molten rock through volcanic vents or fissures is driven by seafloor spreading and decompression melting of the upper mantle, the partially molten layer just beneath the earth’s crust.

Well documented sedimentary records from the East Pacific Rise (EPR) – a mid-ocean ridge extending roughly from Antarctica to the Gulf of California – show evidence of increased hydrothermal activity at the ends of the last two glacial eras.

Researchers also examined core samples from the ocean floor mountain ridges and determined concentrations of major and trace elements.

The results establish the timing of hydrothermal anomalies. Says Lund, “Our results support the hypothesis that enhanced ridge magmatism [the release of molten rock through volcanic vents or fissures], hydrothermal output, and perhaps mantle CO2 flux act to reduce the size of ice sheets.”

The Causes of Heating and Cooling of Earth’s Core and Climate Change

Ongoing studies supported by the NSF (National Science Foundation) indicate a connection between submarine troughs (rifts), Earth’s mantle, and Earth’s outer core. Furthermore, new research indicates the shifting of magnetic flux via Earth’s magnetic field, has a direct and symbiotic relationship to Earth’s outer core, mantle, lithosphere, and crust.

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As a living entity, Earth fights for its survival. If internal or external events begin to throw Earth out of balance i.e. orbital, tilt, or magnetic alignment – it begins to correct itself. When oceanic tectonic subductions occur, it cools the mantle and outer core. To balance this shift in temperatures, the Earth’s core increases heat and as a result releases what is known as “mantle plumes”. These plumes filled with super-heated liquid rock float up to the ocean bottom surface.

This action both cools the outer core and heats the oceans. As a result of heated oceans, we get tropical storms and various forms of extreme weather. When troughs, subduction zones, and rifts shift, as a result of convection, earthquakes, tsunamis, and volcanoes occur.

What makes this all work is the Earth’s magnetic field. Right now the magnetic field is weakening significantly. This will continue until it reaches zero point, at which time there will be a full magnetic reversal. Until this time, we will witness magnetic north bouncing in the northern hemisphere. Closer to the moments of a full reversal, we will see magnetic north drop down to/then below the equator.

As a result of a weakened magnetic field, larger amounts of radiation via charged particles such as solar flares, coronal mass ejections, gamma rays, and galactic cosmic rays – are more abundantly reaching Earth’s atmosphere and having a heightened reaction with Earth’s core layers. This is what causes looped reaction. Radiation heats the core layers, the outer core reacts by producing ‘mantle plumes’, which causes crustal fracturing, which then causes earthquakes, volcanoes, heated oceans – all of which cools the outer core.

This seemingly repeating loop will continue until the Earth will once again find its balance. Until then, we can expect naturally occurring earth changing events which will produce the loss of mass in some parts of the world, and emergence of mass in other parts. Maybe this is the time to change the things we can (attitude, environment, community, self, surroundings), one would be a fool not to apply themselves within their means – but then there is the time to loosen up a bit, know what is happening is just part of a process.

Just as the Earth, we humans can just keep on trucking, and maybe, just maybe, some will simply ‘enjoy-the-ride’.